I added a switch to my company's network and have been having trouble keeping the node status to up. Every now and then, NPM will tell me the node is up, but then about four minutes later the node will go down again. My belief is that this is because I can't get NPM to validate the SNMP read-only string that is configured on the switch. It is the same string used by countless other switches on the company's network, and some of the switches have nearly identical node settings to this problem switch, but I still can't keep the node status to up consistently.
Does anyone know what might be the matter?